#include "StdAfx.h"
#include "CvvImage.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CV_INLINE RECT NormalizeRect( RECT r );
CV_INLINE RECT NormalizeRect( RECT r )
{
  int t;
  if( r.left > r.right )
  {
    t = r.left;
    r.left = r.right;
    r.right = t;
  }
  if( r.top > r.bottom )
  {
    t = r.top;
    r.top = r.bottom;
    r.bottom = t;
  }

  return r;
}
CV_INLINE CvRect RectToCvRect( RECT sr );
CV_INLINE CvRect RectToCvRect( RECT sr )
{
  sr = NormalizeRect( sr );
  return cvRect( sr.left, sr.top, sr.right - sr.left, sr.bottom - sr.top );
}
CV_INLINE RECT CvRectToRect( CvRect sr );
CV_INLINE RECT CvRectToRect( CvRect sr )
{
  RECT dr;
  dr.left = sr.x;
  dr.top = sr.y;
  dr.right = sr.x + sr.width;
  dr.bottom = sr.y + sr.height;

  return dr;
}
CV_INLINE IplROI RectToROI( RECT r );
CV_INLINE IplROI RectToROI( RECT r )
{
  IplROI roi;
  r = NormalizeRect( r );
  roi.xOffset = r.left;
  roi.yOffset = r.top;
  roi.width = r.right - r.left;
  roi.height = r.bottom - r.top;
  roi.coi = 0;

  return roi;
}
void  FillBitmapInfo( BITMAPINFO* bmi, int width, int height, int bpp, int origin )
{
  assert( bmi && width >= 0 && height >= 0 && (bpp == 8 || bpp == 24 || bpp == 32));

  BITMAPINFOHEADER* bmih = &(bmi->bmiHeader);

  memset( bmih, 0, sizeof(*bmih));
  bmih->biSize = sizeof(BITMAPINFOHEADER);
  bmih->biWidth = width;
  bmih->biHeight = origin ? abs(height) : -abs(height);
  bmih->biPlanes = 1;
  bmih->biBitCount = (unsigned short)bpp;
  bmih->biCompression = BI_RGB;
  if( bpp == 8 )
  {
    RGBQUAD* palette = bmi->bmiColors;
    int i;
    for( i = 0; i < 256; i++ )
    {
        palette[i].rgbBlue = palette[i].rgbGreen = palette[i].rgbRed = (BYTE)i;
        palette[i].rgbReserved = 0;
    }
  }
}
CvvImage::CvvImage()
{
  m_img = 0;
}
void CvvImage::Destroy()
{
  cvReleaseImage( &m_img );
}
CvvImage::~CvvImage()
{
  Destroy();
}
bool  CvvImage::Create( int w, int h, int bpp, int origin )
{
  const unsigned max_img_size = 10000;

  if( (bpp != 8 && bpp != 24 && bpp != 32) ||
    (unsigned)w >=  max_img_size || (unsigned)h >= max_img_size ||
    (origin != IPL_ORIGIN_TL && origin != IPL_ORIGIN_BL))
  {
    assert(0); // most probably, it is a programming error
    return false;
  }
  if( !m_img || Bpp() != bpp || m_img->width != w || m_img->height != h )
  {
    if( m_img && m_img->nSize == sizeof(IplImage))
        Destroy();
   
    m_img = cvCreateImage( cvSize( w, h ), IPL_DEPTH_8U, bpp/8 );
  }
  if( m_img )
    m_img->origin = origin == 0 ? IPL_ORIGIN_TL : IPL_ORIGIN_BL;
  return m_img != 0;
}
void  CvvImage::CopyOf( CvvImage& image, int desired_color )
{
  IplImage* img = image.GetImage();
  if( img )
  {
    CopyOf( img, desired_color );
  }
}
#define HG_IS_IMAGE(img)                                                  \
  ((img) != 0 && ((const IplImage*)(img))->nSize == sizeof(IplImage) && \
  ((IplImage*)img)->imageData != 0)
void  CvvImage::CopyOf( IplImage* img, int desired_color )
{
  if( HG_IS_IMAGE(img) )
  {
    int color = desired_color;
    CvSize size = cvGetSize( img );
    if( color < 0 )
        color = img->nChannels > 1;
    if( Create( size.width, size.height,
        (!color ? 1 : img->nChannels > 1 ? img->nChannels : 3)*8,
        img->origin ))
    {
        cvConvertImage( img, m_img, 0 );
    }
  }
}
bool  CvvImage::Load( const char* filename, int desired_color )
{
  IplImage* img = cvLoadImage( filename, desired_color );
  if( !img )
    return false;

  CopyOf( img, desired_color );
  cvReleaseImage( &img );

  return true;
}
bool  CvvImage::LoadRect( const char* filename,
                  int desired_color, CvRect r )
{
  if( r.width < 0 || r.height < 0 ) return false;

  IplImage* img = cvLoadImage( filename, desired_color );
  if( !img )
    return false;
  if( r.width == 0 || r.height == 0 )
  {
    r.width = img->width;
    r.height = img->height;
    r.x = r.y = 0;
  }
  if( r.x > img->width || r.y > img->height ||
    r.x + r.width < 0 || r.y + r.height < 0 )
  {
    cvReleaseImage( &img );
    return false;
  }
 
  if( r.x < 0 )
  {
    r.width += r.x;
    r.x = 0;
  }
  if( r.y < 0 )
  {
    r.height += r.y;
    r.y = 0;
  }
  if( r.x + r.width > img->width )
    r.width = img->width - r.x;

  if( r.y + r.height > img->height )
    r.height = img->height - r.y;
  cvSetImageROI( img, r );
  CopyOf( img, desired_color );
  cvReleaseImage( &img );
  return true;
}
bool  CvvImage::Save( const char* filename )
{
  if( !m_img )
    return false;
  cvSaveImage( filename, m_img );
  return true;
}
void  CvvImage::Show( const char* window )
{
  if( m_img )
    cvShowImage( window, m_img );
}
void  CvvImage::Show( HDC dc, int x, int y, int w, int h, int from_x, int from_y )
{
  if( m_img && m_img->depth == IPL_DEPTH_8U )
  {
    uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
    BITMAPINFO* bmi = (BITMAPINFO*)buffer;
    int bmp_w = m_img->width, bmp_h = m_img->height;
    FillBitmapInfo( bmi, bmp_w, bmp_h, Bpp(), m_img->origin );
    from_x = MIN( MAX( from_x, 0 ), bmp_w - 1 );
    from_y = MIN( MAX( from_y, 0 ), bmp_h - 1 );
    int sw = MAX( MIN( bmp_w - from_x, w ), 0 );
    int sh = MAX( MIN( bmp_h - from_y, h ), 0 );
    SetDIBitsToDevice(
        dc, x, y, sw, sh, from_x, from_y, from_y, sh,
        m_img->imageData + from_y*m_img->widthStep,
        bmi, DIB_RGB_COLORS );
  }
}
void  CvvImage::DrawToHDC( HDC hDCDst, RECT* pDstRect )
{
  if( pDstRect && m_img && m_img->depth == IPL_DEPTH_8U && m_img->imageData )
  {
    uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
    BITMAPINFO* bmi = (BITMAPINFO*)buffer;
    int bmp_w = m_img->width, bmp_h = m_img->height;
    CvRect roi = cvGetImageROI( m_img );
    CvRect dst = RectToCvRect( *pDstRect );
    if( roi.width == dst.width && roi.height == dst.height )
    {
        Show( hDCDst, dst.x, dst.y, dst.width, dst.height, roi.x, roi.y );
        return;
    }
    if( roi.width > dst.width )
    {
        SetStretchBltMode(
          hDCDst,          // handle to device context
          HALFTONE );
    }
    else
    {
        SetStretchBltMode(
          hDCDst,          // handle to device context
          COLORONCOLOR );
    }
    FillBitmapInfo( bmi, bmp_w, bmp_h, Bpp(), m_img->origin );
    ::StretchDIBits(
        hDCDst,
        dst.x, dst.y, dst.width, dst.height,
        roi.x, roi.y, roi.width, roi.height,
        m_img->imageData, bmi, DIB_RGB_COLORS, SRCCOPY );
  }
}
void  CvvImage::Fill( int color )
{
  cvSet( m_img, cvScalar(color&255,(color>>8)&255,(color>>16)&255,(color>>24)&255) );
}